Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.07-3.132.60-3.02
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
-
Cleavage
{100} Perfect, {010} Distinct, {102} Distinct
Perfect
Mohs Hardness
3-3.5-9999
2
10
👆🏻
Chemical Composition
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe2+ ) 5Al(Si 3Al)O 10(OH) 8Anthony et al , Handbook of mineralogy (2001)